Koh Bon is a small granite rocky island about 20km northeast of the northernmost tip of the Similan Islands. On the surface it’s just rock topped with a little greenery. No beaches or anywhere to land on the island, though there is a hole that passes from one side of the island to the other. There is a sheltered bay that is sometimes used for night dives. There are 2 main dive sites at Koh Bon. The most dived is the ridge that sticks out from the western side of the island and continues underwater down to a depth of 40 meters. There is also a deep pinnacle on the north side of the island. Koh Bon is on the route of most Thailand liveaboard trips.
Koh Bon Island near the Similan islands
Koh Bon Ridge
Maybe the best place to find manta rays in the region. The dive site follows a ridge jutting out from the west of the island, covered in pastel shaded soft corals, which drops to depths of 35-40m. Mantas are often spotted over the ridge or in the deep water to the South. Leopard sharks are also common in the deeper water and this is a good location to find the elusive purple fire goby! The reef here is mostly rocky but marine life is good, often large schools of sweetlips or snappers.
Koh Bon Dive Site Map
Koh Bon Pinnacle
If you head northeast of the ridge, about one hundred metres or so from the rocky reef that encircles Koh Bon island, there is a deep pinnacle which tops out at 18m depth, but dropping to over 50m. It is certainly a deep dive and great for experienced divers who want something a bit different. Koh Bon pinnacle can be a great place to find mantas or leopard sharks. The north side of the pinnacle drops off steeply while on the south side you can make a long swim at 28 – 30m depth to reach the main island reef.
Koh Bon is on the route of most Thailand liveaboards. There are also day trips possible to Koh Bon (2 dives) on Sunday or Wednesday with pick up in Phuket or Khao Lak.
Contact Sunrise Divers
A Real Dive Center With A Real Shop
Sunrise Divers is not just a website. We are right here to help you with a PADI 5 Star shop, helpful and experienced staff, quality rental equipment and plenty of local knowledge. We hope to meet you in person!
21 Years of Thailand Diving Experience
Sunrise Divers has been operating in Phuket, Thailand since 1999 logging thousands of dives all over the region. We know the area, we know the dive sites, we know the boats. Let us help you find the right trip!
Liveaboard Price Guarantee
We advertise all trips at the official rates agreed with the boat operators. If you are offered the same trip on the same liveaboard at a lower price, tell us! We promise to get you the best trip at the best possible price!
We Make Booking Liveaboards Easy
With our many years of experience, booking with Sunrise Divers is quick and easy. Got a question? We'll answer! Need to talk? Call us! Online credit card payment with no fees is possible for most trips. We know the boats and the area better than anyone. See you here!
Similan Islands Liveaboards (Thailand)
South Siam 3 – 2D/1N Similan Islands & Koh Bon
South Siam 3 runs twice weekly 3 day / 2 night trips to the Similan Islands, Koh Bon, Koh Tachai, Surin islands and Richelieu Rock. Divers can make a longer trip by starting on the right day (ask us for details - see more information and prices [...]
Prices starting from 6000 / day
South Siam 4 runs twice weekly 3 day / 2 night trips including Similan Islands, Koh Bon, Koh Tachai, Surin islands and also diving at Richelieu Rock. You can also make a longer trip by starting on the right day (ask us for details - see prices b [...]
Prices starting from 6000 / day
The Deep Andaman Queen was having a complete make over in 2019. She has been extended by 3 meter and got 2 more cabins.
Cruises in the Similan Islands / Richelieu Rock and also into Myanmar (Burma) with the liveaboard "Deep Andaman Queen". This [...]
Prices starting from 7875 / day
Diving in Thailand and Myanmar - The luxury liveaboard Diva Andaman runs 6 night trips to the Similan Islands and the Mergui Archipelago. The boat was completed in 2009 and has been one of our most popular boats. Early booking is suggested. It's [...]
Prices starting from 18800 / day